Andrew James has been interested in double stars since the late 1970s. He is a long-term member, and past President, of the Astronomical Society of New South Wales (ASNSW), and formed its Double Star Section in 1979. His interests include the historical backgrounds and works of various discoverers of southern double stars.
2 电子书 Bob Argyle
Bob Argyle: Observing and Measuring Visual Double Stars
Double stars are the rule, rather than the exception: our solar system, having a single sun, is in the minority. Orbiting satellites, ground-based observatories and interferometers have all helped di …
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